Swapping proportioning valve for "T" fitting... Options

[Wanna9146]

I read on this forum recently about someone swapping out their proportioning valve for a "T" fitting.

Does anyone know the size/thread count of the correct "T" fitting? Any fabrication required?

[Krieger]

You can also purchase the same "T" fitting at your local VW parts and accessories store for about half the price of the Porsche dealer. The last time I purchased one at a VW store I paid $7.00 for it.

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I upgraded front brakes to BWM calipers and did this mod about 6 years ago. The originak reg is still in a zip lock.

[Wanna9146]

I upgraded front brakes to BWM calipers and did this mod about 6 years ago. The originak reg is still in a zip lock.

I don't need to do the BMW caliper conversion for this to work, right?

[r_towle]

I upgraded front brakes to BWM calipers and did this mod about 6 years ago. The originak reg is still in a zip lock.

I don't need to do the BMW caliper conversion for this to work, right?

Well, in reality yes.

In any car you want a bias towards the front brakes for safety.
When you stand hard on the brakes, a considerable amount of weight is transfered to the front of the car.
This has the affect of raising the rear of the car.
70% of your braking should be done by the front brakes and that is how the stock proportioning valve is setup to work.
Its how all cars are setup and its why you wear out front brakes alot faster than rear brakes.
If you put larger brakes up front, you can create the same affect and thus you can use the t-fitting.

Currently our brakes are not designed this way, so the proportioning valve delivers more pressure to the front brakes and creates the 70-30 split.

There is a very good chance that in an emergency braking situation you will loose control of the rear of the car if you have stock brakes and no proportioning valve.
These cars spin like tops once the rear lets loose, and with such low HP, there is little chance to power your way back straight again.

The stock system is designed very well, and the Proportioning valve is a simple piston/spring that has few moving parts.
They are tough to learn how to bleed through, but once you learn that, its a simple system. The t-fitting makes bleeding the brakes alot easier, but in relaity, how often do you really bleed your brakes??

Rich

[Wanna9146]

The stock system is designed very well, and the Proportioning valve is a simple piston/spring that has few moving parts.
They are tough to learn how to bleed through, but once you learn that, its a simple system. The t-fitting makes bleeding the brakes alot easier, but in relaity, how often do you really bleed your brakes??

Rich

That's the problem I'm having now. I'm planning ahead in anticipation of the proportioning valve being DOA. The car has been sitting for 15 yrs.